TDA-ReCTS: A Validation Set for Text Detection Ambiguity

Introduction

TDA-ReCTS is a validation set for benchmarking text detection ambiguity, which contains 1,000 ambiguous images selected from the training set of ICDAR 2019 ReCTS.

This repository includes TDA-ReCTS's training list, validation list, and evaluation script. The code of AE TextSpotter is released at https://github.com/whai362/AE_TextSpotter.

Fig. 1: Some exmaples in validation list.

Requirements

• Python3
• mmcv==0.2.13
• Polygon3==3.0.8
• editdistance

Generation of Training and Validation List

python gen_train_val_list.py --data_root ${RECTS_ROOT}

The root of ReCTS should be:

RECTS_ROOT
├── train
│   ├── img
│   ├── gt
├── test
│   ├── img

Submission Format

A json file that includes the prediction of all images. Here is an example submission.

[{"img_name": "train_ReCTS_001213.jpg", 
  "points": [[[x_00, y_00], [x_01, y_01],..., [x_0n, y_0n]], 
             [[x_11, y_11], [x_12, y_11],..., [x_1n, y_1n]],
             ...,
             [[x_m1, y_m1], [x_m2, y_m1],..., [x_mn, y_mn]]], 
  "scores": [score_0, score_1, ..., score_m], 
  "texts": [text_0, text_1, ..., text_m]}
]

Evaluation Script

python eval_script/eval.py --gt eval_script/val_gt.zip --pred eval_script/example_pred.json

This evaluation script based on that of BDD100K. The output of the evaluation script should be:

[Best F-Measure] p: 84.79, r: 78.16, f: 81.34, 1-ned: 51.08, best_score_th: 0.569
[Best 1-NED]     p: 86.55, r: 76.32, f: 81.11, 1-ned: 51.60, best_score_th: 0.626

Here, 1-NED is a metric for text recognition, which can be formulated as:

Eqn. 1: $N_{FP}$, $N_{TP}$ and $N_{GT}$ mean the number of false-positive, true-positive and ground-truth text lines, respectively. $S_i$ and $\hat{S}_i$ represent predicted transcription and ground-truth transcription, respectively.

Citation

If you use this work in your research, please cite us.

@inproceedings{wenhai2020ae,
  title={AE TextSpotter: Learning Visual and Linguistic Representation for Ambiguous Text Spotting},
  author={Wang, Wenhai and Liu, Xuebo and Ji, Xiaozhong and Xie, Enze and Liang, Ding and Yang, ZhiBo and Lu, Tong and Shen, Chunhua and Luo, Ping},
  booktitle={European Conference on Computer Vision (ECCV)},
  year={2020}
}